Whew! It’s over – over three months of preparation went into a mere six shows, but the Footprint Theatre production of Arsenic and Old Lace is now all over. It went really well, and I think (though I say it myself) that it went much better than it had any right to, considering that it was my first ever attempt at directing a full-length play.
Someone on a mailing list asked recently “What’s the best practice for IPv6 addressing?” The question got me thinking, and I thought I’d share some useful guidelines.
So you have an application. It was written (as far as you know) without IPv6 in mind, and now it has to work with IPv6. How hard is that going to be? Well, it depends on the application. Most of the following is not really Java specific (but some of it is).
I’ve just spent an hour struggling with (I thought) IPv6 on Windows 7. IPv6 is enabled by default on Windows 7. I was seeing autoconfigured addresses on the ethernet interface, but there was no IPv6 connectivity beyond that. Looking at it with Wireshark, I could see neighbor discovery packets leaving, but answer came there none. No firewall rules were blocking ICMPv6; in desperation I turned the firewalls OFF on both source and destination test machines – still nothing. What the…?
IPv6 destination address selection is the process of deciding which IPv6 address a connection should be made to. This is the flip side of IPv6 source address selection, which has been the subject of several earlier articles (start here). Destination address selection is described in the same RFC as source address selection – RFC 6724 (which obsoletes RFC 3484).
If you read the doco (like “man gai.conf”) you would be forgiven for thinking that the contents of /etc/gai.conf controlled source and destination address selection in IPv6. You would be wrong.
“To verb” is to make a verb out of something else, typically a noun. Lots of common words are (or appear to be) verbed nouns (even though many are nouned verbs!), so the verb “to verb” tends to be used only with obvious neoplasms.
“To verbify” is simply to use many verbs (cf. “speechify”).
“Verbification” is the noun form of “verbify”, as in “his verbification was delightful”.
“Verbifying” is an alternative to “verbification”, as in “his verbifying delighted the audience”.
A verb constructed by verbing a nouned verb is of course a “reverb”. Repeating the process (which is orthographically invisible except to the trained professional) is known as reverberation.
Trust me, I’m a verbologist.
[This was written in 2006 in reaction to a then-proposed Australian benefits card, but it applies to any similar card, proposed by any Government, in any country. The card was intended, allegedly, to support access to welfare; in practice, however, the proposal described an identity card…]
If you have an apple and you want to sell me your apple and, in spite of me telling you I do not need, do not want and indeed will never need or want your apple, you continue to ring me on a daily basis during dinner time to try to explain why I should buy your apple then I reserve the right to tell you to stick your f***ing apple where the sun does not shine. Get the idea?
Karl Auer, June 2006